Wrench.



A. CARP.

WRENCH.

APPLIGATION FILED JUNE 17, 1912.

1,042,531 Patented Oct. 29, 1912.

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ARTHUR CARP, OF ST. LOUIS, MISSOURI.

WRENCH.

Specification of Letters Patent.

Patented Oct. 29, 1912.

Application filed .Tune 17, 1912. Serial No. 704,112.

To all whom 'it may concern Be it known that I, ARTHUR CARP, a subject of the Czar of Russia, and resident of St. Louis, Missouri, have invented certain new and useful Improvements in iVrenches, of which the following is a specification c ontaining a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in wrenches, and the object of my invention is to construct a wrench provided with means whereby the movable jaw may be rel'eased and spring-pressed to an extended position. The said releasing means is arranged in such manner as to permit of an adjustment of the sliding jaw to theA finest degree, said releasing means being also arranged in such manner as to form a lock in order to prevent a movement of the sliding` j aw when in a closed position.

Vith the above purposes in view'pmy invention consists in certain novel features of construction and arrangement of parts as will be hereinafter more fully described, pointed out in the claims and illustrated by the accompanying drawings, in which- F igure 1 is a longitudinal, sectional elevation of the complete wrench, the sliding jaw being shown in a closed position; Fig. 2 is a view similar to Fig. 1 with the sliding jaw shown in an extended position; Fig. 3 is a transverse, sectional elevation taken on the line 3 3 of Fig. 1; and Fig. 4 is a transverse, sectional elevation taken on the line 4 4 of Fig. 1.

Referring by numerals to the accompanying drawings: 5 designates the Abody or handle portion of the wrench which is preferably constructed of a single piece of metal in rectangular tube form, the handle being open at both of its ends and the outer forward corner of the handle is beveled off in order that the head 6 of the fixed jaw may lie as closely as possible to the end of the handle. The said jaw is provided with an integral, rectangular shank 7 which is secured in the handle by means of rivets 8, or the like.

9 designates a cut away portion formed by removing portions of the side and front walls of the handle 5. This cut away portion extends from the inner end of the shank 7 of the fixed jaw and provides for the exposure of the adjusting screw 10 having pivotally mounted formed integral therewith a portion 11 provided with a knurled surface.

12 designates a block which is arranged adjacent the inner end of the handle and upon a pin 13 in order that it may rock within the handle 5. The block 12 is pro-vided with a longitudinal bore to receive the rod 14, the upper or forward end of which is seated in a depression 15 formed in the inner end of the shank 7 of the fixed jaw. The adjusting screw 10 is secured to the rod 14 by means of a pin or screw 16. At the inner end of the rod 14 there is a handle 17 providing a means other than the portion 11, having the knurled surface, for rotating the adjusting screw 10.

18 designates the sliding jawv provided with an integral shank 19 having teeth 20 arranged for engagement with the adjusting screw lO. Carried by and preferably formed integral with the shank 19 of the sliding jaw there is a screwk driver 21, which is embracedby an extensile coil spring 22 impinging at its one end against the inner end of the shank 19 of the sliding jaw and at its other end upon a projection 23 of the block l2. Said projection is bifurcated in order to permit of a movement of the screw driver 21 beyond the said projection so that t-he screw driver will project beyond the end of the handle 5 for use.

24 designates a stop formed integral with the shank 19 of the sliding jaw at the innermost or lower end of the rack formed by the teeth 20. This stop 24 is designed to engage with the portion 11 of the screw in order to limit the outward or extended movement of the sliding jaw.

The practical operation of the wrench is as follows: Assuming the parts to be in the positions as illustrated in Fig. 1, it is obvious that the screw l0 can not be moved away from the teeth 20 of the sliding jaw', for the reason that the end of the rod 14 is held in the depressions l5 formed in the inner end of the shank 7 of the fixed jaw; nor can the screw 10 and rod 14 be moved inwardly, because of the engagement between the screw and the teeth 9 of the shank of the sliding jaw. In this condition the wrench may be carried without danger of the screw 10 releasing and permitting the sliding jaw to be moved outwardly. If it be desired to release the jaw, so that it may be moved outwardly by the spring, the screw l() is turned, either by a manipulation of the portion ll or the handle 17, thus moving the threads of the screw in a position t cause the spring 22 to move the sliding jaw to a position slightly removed from the iixed jaw. In this position, that is the sliding jaw slightly removed from the iixed jaw, the entire screw may be moved with the rod lll and shank I9 inwardly to release the end of the rod from the depression i permitting a movement of the screw bodily away from the teeth 9 ot the shank of the sliding jaw. The spring Q2 then causes the jaw 18 to move outwardly. In this outward moven'ient the jaw may be stopped at any desired point by pressing the screw to engage with the teeth 9, or the said movement will be limited by the stop 2li engaging with the portion Il of the screw', as clearly shown in Fig. 2. Ry reason of the spring 2:2 bearing against the projection 23 of the pivoted block above the pivotal center of the block the block and the rod let carried thereby will hold the screw 10 in a position normally to engage with the rack of the sliding jaw.

I cla-im:

1. In a wrench, the combination with a l hollow handle, a gaw fixed to said handle, a sliding jaw having a rack arranged for f movement in said handle, a spring` ior moving said sliding aw' in one direction, a pivoted block acted upon by said spring, a rod carried by said block, a screw carried by said rod and arranged to engage t-he rack of the sliding jaw, means for manually turning said screw, and a fixed bearing for the end of said rod opposite the end supported in said pivoted block, substantially as shown and for the purposes stated. y 2. In a wrench, the combination with a tubular, metallic handle, a jaw iixed in said handle, a sliding jaw having a rack arranged for movement in said handle, a pivoted block, an extensile coil spring` acting on said sliding jaw and said pivoted block, a rod carried by said pivoted block and ar ranged for lengthwise movements relative thereto, a member having a threaded portion for engagement with said rack and a knurled portion for its manipulation se cured nonrotatably adjacent the end of said rod, and a fixed bearing in the end of said fixed j aw for the end of said rod.

In testimony whereof, I have signed my y name to this specification, in presence of two subscribing witnesses.

ARTHUR CARP. Witnesses:

E: L. WALLACE, JOHN C. IIIenoN.y

Copies of this patent may be obtained for five centseach, by addressing the Commissioner of Patents,

Washington, D. C. 

